Qt QML

Qt QML

The Qt QML module provides a framework for developing applications and libraries with the QML
language. It defines and implements the language and engine infrastructure, and provides an API to enable application developers to extend the QML language with custom types and integrate QML code with JavaScript and C++. The Qt QML module provides both
a QML API and a C++
API.

Qt QML模块为使用QML
语言开发应用程序和库提供了一个框架。它定义并实现了语法和基础引擎，还为程序员提供了API去使用自定义类型和用JavaScript和C++语言整合的QML代码扩展QML语言。Qt QML模块同时提供QML
API和C++
API。

Note that while the Qt QML module provides the language and infrastructure for QML applications, the Qt
Quick module provides many visual components, model-view support, an animation framework, and much more for building user interfaces.

注意：Qt QML模块为QML应用程序提供语法和基础结构的同时，Qt
Quick模块也为建立用户界面提供了很多可视化组件，视图模型支持，动画框架等。

For those new to QML and Qt Quick, please see QML Applications for
an introduction to writing QML applications.

要了解QML和Qt Quick的新功能，请查看QML
Applications（编写QML应用程的介绍）。

Getting Started

新手入门

To include the definitions of the module's classes, use the following directive:

要引入模块中类的定义，直接使用以下代码：

#include <QtQml>

The QML types in Qt QML are available through the 

QtQML

 import. To use the types, add the following import statement to your .qml file:

Qt QML中的QML类型也可以通过QtQML的import引入，要使用这种方法，在你的.qml文件中添加以下import语句

import QtQml 2.0

To link against the module, add this line to your qmake 

.pro

 file:

要链接模块，添加这行到你的qmake使用的.pro文件中。

QT += qml

QML and QML Types

QML和QML类型

The Qt QML module contains the QML framework and important QML types used in applications. The constructs of QML are described in the The
QML Reference.

In addition to the QML Basic Types, the module
comes with the following QML object types:

Component

QtObject

Binding

Connections

Timer

The Qt global object provides useful enums and functions for
various QML types.

Lists and Models

New in Qt 5.1, the model types are moved to a submodule, 

QtQml.Models

. The Qt
QML Models page has more information.

DelegateModel

DelegateModelGroup

ListElement

ListModel

ObjectModel

JavaScript Environment for QML Applications

JavaScript expressions allow QML code to contain application logic. Qt QML provides the framework for running JavaScript expressions in QML and from C++.

These sections are from The QML Reference.

Integrating QML and JavaScript

Using JavaScript Expressions with QML

Dynamic QML Object Creation from JavaScript

Defining JavaScript Resources In QML

Importing JavaScript Resources In QML

JavaScript Host Environment

Integrating QML with C++ Applications

The module also provides the framework for running QML applications. The QML framework allows QML code to contain JavaScript expressions and for the QML code to interact with C++ code.

Important C++ Classes Provided By The Qt QML Module

Integrating QML and C++

Additional Frameworks

The Declarative State Machine Framework

Licenses and Attributions

Qt QML is available under commercial licenses from The Qt Company. In addition,
it is available under the GNU Lesser General Public License,
version 3, or the GNU General Public License, version 2.
See Qt Licensing for further details.

Furthermore Qt QML potentially contains third party modules under following permissive licenses:

JavaScriptCore Macro Assembler

BSD 2-clause "Simplified" License

Guides and Other Information

Further information for writing QML applications:

The QML Reference

QML Applications - essential information for application
development with QML and Qt Quick

Qt Quick - a module which provides a set of QML types and
C++ classes for building user interfaces and applications with QML

Reference

C++ Classes

QML Types

Examples